An electronic apparatus includes at least one heat generating component and an immersion cooling system. The immersion cooling system includes a main tank and a liquid amount adjusting module. The main tank is adapted to contain a heat dissipation medium, and the heat generating component is disposed in the main tank to be immersed in the heat dissipation medium. The liquid adjusting module includes an auxiliary tank and a pump. The auxiliary tank is adjacent to the main tank, and the heat dissipation medium in the main tank is adapted to be overflowed into the auxiliary tank. The pump is disposed in the auxiliary tank and adapted to drive the heat dissipation medium in the auxiliary tank to flow into the main tank.